There is a massive difference between shooting tracers at a fuel tank and the tank being in a car crash. In the Mythbusters test, all of the bullets enter at ro

There is a massive difference between shooting tracers at a fuel tank and the tank being in a car crash. In the Mythbusters test, all of the bullets enter at roughly the same speed, roughly the same angle, have the same size, the same heat, and the environment is "clean"; the only objects that need to be considered are the bullets and the tank. In a car crash, the number of factors is massively increased. The fact that a fuel tank did not explode when it had tracer bullets fired at it does not imply that fuel tanks don't catch fire.